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What is smog made of?

What is smog made of?

Smog, formed mainly above urban centres, is composed mainly of tropospheric ozone (O3); primary particulate matter such as pollen and dust; and secondary particulate matter such as sulphur oxides, volatile organic compounds, nitrogen oxides (NOx) and ammonia gas.

What is the combination of smog?

Smog is a combination of Smoke and fog. Hence the word smog is also derived from the two words.

Why is smog a mixture?

Smog is a kind of air pollution, originally named for the mixture of smoke and fog in the air. Classic smog results from large amounts of coal burning in an area and is caused by a mixture of smoke and sulfur dioxide.

What is the main component of photochemical smog?

nitrogen dioxide
The major undesirable components of photochemical smog are nitrogen dioxide (NO2), ozone (O3), PAN (peroxyacetylnitrate), and chemical compounds that contain the –CHO group (aldehydes). PAN and aldehydes can cause eye irritation and plant damage if their concentrations are sufficiently high.

Is smog a mixture?

What we typically call “smog” today is a mixture of pollutants that is primarily made up of ground-level ozone. In other words, we can say combination of smoke and fog is SMOG which considerably reduces visibility (Fig. 14.11).

What is smog in chemistry?

Smog is a specific type of air pollution. Smog is made up of many chemicals including nitrogen oxides (NOx), sulphur dioxide (SOx), carbon monoxide (CO), and volatile organic compounds (VOCs), but the two main components of smog are particulate matter (PM) and ground-level ozone (O3).

Is smog gas gas mixture?

The correct answer is Gas mixed with a liquid and a solid. It is the term derived from two words smoke and fog. It is a kind of intense air pollution. The word smog was coined in the 20th century.

Is smog a compound or mixture?

Smog is typically a complex mixture of gaseous combustion products, including oxides of carbon, sulfur and nitrogen, ozone, hydrocarbons, reaction products of ozone, and other pollutants and particulate aerosols of carbon and various metal oxides.

What is smog and photochemical smog?

What is photochemical smog? Photochemical smog is a mixture of pollutants that are formed when nitrogen oxides and volatile organic compounds (VOCs) react to sunlight, creating a brown haze above cities. It tends to occur more often in summer, because that is when we have the most sunlight.

What is smog and how it is formed?

Photochemical smog is produced when sunlight reacts with nitrogen oxides and at least one volatile organic compound (VOC) in the atmosphere. Nitrogen oxides come from car exhaust, coal power plants, and factory emissions. When sunlight hits these chemicals, they form airborne particles and ground-level ozone—or smog.

What kind of colloid is smog?

Smog is a colloidal mixture (aerosol) of liquid and solid particles dispersed in a gas. Explanation: A colloid is a colloidal dispersion of a two-phase heterogeneous mixture made up of a dispersed phase of tiny particles that are distributed evenly within a continuous phase.

What is smog and types of smog?

smog, community-wide polluted air. At least two distinct types of smog are recognized: sulfurous smog and photochemical smog. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.